{ "openapi": "3.1.1", "info": { "title": "Screentone Pattern Maker API", "version": "1.0.0", "summary": "Make dot, line and crosshatch tones with explicit pitch, coverage and print scale.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://fliplinescreentone.usefulweb.site" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Make dot, line and crosshatch tones with explicit pitch, coverage and print scale.", "description": "Generate a repeating vector screentone, inspect its nominal ink coverage and lines per inch, and download an SVG or reusable tone recipe. Open it as a Comic Desk study or apply the recipe to an existing panel.\n\nMethodology:\n- Pitch is the repeating cell size in source pixels. Nominal lines per inch = DPI / pitch; physical size in mm = pixels / DPI × 25.4. No printer-specific dot gain or color conversion is modelled.\n- For dots, radius = pitch × sqrt(coverage / π). Parallel stripe width = pitch × coverage. For perpendicular crosshatch, stripe width = pitch × (1 − sqrt(1 − coverage)), accounting for overlap. Pattern rotation preserves this nominal coverage.\n- Coverage is 5–75%, pitch 4–80 px and angle −90° to 90°. SVG keeps vector patterns; the tone recipe imports into Comic Desk with pitch rescaled to preserve lines per inch at the page DPI. Avoid resampling a rasterized tone to reduce moiré.\n\nNominal geometric coverage, not a measured ink density. Raster resampling and printing can introduce moiré.", "tags": [ "apps" ], "x-mcp-tool": "flipline_screentone", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/FliplineScreentoneInput" }, "examples": { "example1": { "summary": "A 20% dot tone", "value": {} }, "example2": { "summary": "A 35% crosshatch", "value": { "pattern": "crosshatch", "coverage": 35, "angle": 0, "pitch": 20 } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/FliplineScreentoneResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "FliplineScreentoneInput": { "type": "object", "additionalProperties": false, "properties": { "pattern": { "title": "Tone pattern", "type": "string", "enum": [ "dots", "lines", "crosshatch" ], "default": "dots" }, "pitch": { "title": "Tone pitch (px)", "type": "integer", "minimum": 4, "maximum": 80, "default": 14 }, "coverage": { "title": "Tone coverage (%)", "type": "integer", "minimum": 5, "maximum": 75, "default": 20 }, "angle": { "title": "Tone angle (°)", "type": "integer", "minimum": -90, "maximum": 90, "default": 45 }, "dpi": { "title": "Tone resolution (DPI)", "type": "integer", "minimum": 72, "maximum": 600, "default": 150 }, "width": { "title": "Swatch width (px)", "type": "integer", "minimum": 64, "maximum": 1600, "default": 600 }, "height": { "title": "Swatch height (px)", "type": "integer", "minimum": 64, "maximum": 1600, "default": 400 }, "ink": { "title": "Tone ink (HEX)", "type": "string", "maxLength": 7, "default": "#253e45" } }, "required": [] }, "FliplineScreentoneResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "recipe", "linesPerInch", "widthMm", "heightMm", "nominalCoverage", "swatch", "recipeFile", "openInApp" ], "properties": { "recipe": { "type": "object", "additionalProperties": false, "required": [ "format", "version", "tone", "dpi", "width", "height" ], "properties": { "format": { "const": "flipline-tone" }, "version": { "const": 1 }, "tone": { "type": "object", "additionalProperties": false, "required": [ "kind", "pitch", "coverage", "angle", "ink", "over" ], "properties": { "kind": { "enum": [ "none", "dots", "lines", "crosshatch" ] }, "pitch": { "type": "number", "minimum": 4, "maximum": 80 }, "coverage": { "type": "number", "minimum": 0.05, "maximum": 0.75 }, "angle": { "type": "number", "minimum": -90, "maximum": 90 }, "ink": { "type": "string", "pattern": "^#[a-fA-F0-9]{6}$" }, "over": { "type": "boolean" } } }, "dpi": { "type": "integer", "minimum": 72, "maximum": 600 }, "width": { "type": "integer", "minimum": 64, "maximum": 1600 }, "height": { "type": "integer", "minimum": 64, "maximum": 1600 } } }, "linesPerInch": { "type": "number" }, "widthMm": { "type": "number" }, "heightMm": { "type": "number" }, "nominalCoverage": { "type": "number" }, "swatch": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "recipeFile": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "openInApp": { "type": [ "string", "null" ] } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }